Buxbaumiella
64

Fellhanera in the Netherlands. -
Fellhanera is a predominantly tropical genus of crustose lichens. In the last decade two
species, F. ochracea and F. viridisorediata, have been described as new to science on
the basis of material from the Netherlands and surrounding countries, after being
known for decades as sterile crusts. The two remaining Dutch species, F. bouteillei and
F. subtilis, show a conspicuous increase from absent or extinct 25 years ago to rather
common in the nineties. All species show a preference for sheltered sites, but occur on
a variety of substrata including rock, tree bases, Vaccinium and other twigs. The
presence of asemone in addition to usnic acid and zeorin (and an additional terpenoid)
is reported from Fellhanera bouteillei for the first time.

Mossen bij Lochem, met name op landgoed Aspen
H.R. Zielman

7-10

Bryophytes near Lochem, in particular the estate of Ampsen
(province of Gelderland) -
A report of two field trips to the estate of Ampsen near Lochem in 1999 and 2000.
Remarkable findings are Dicranum majus, D. fuscescens and several hepatics from
loamy soils such as Diplophyllum albicans and Calypogeia species.

The bryological field trip to Gran Canaria in 1996 -
In February 1996 a group of Dutch bryologists visited Gran Canaria to reach a better
understanding of the bryoflora of the Canary Islands. Special attention was paid to
the so far infrequently investigated coastal zones. Great effort was made to discover
any new sites of Riella species. Due to the wet winter seasonal communities were
well developed. Riccia-species and other thallose liverworts were especially
common. Interesting finds are Riccia ciliifera, R. macrocarpa, Riella cossoniana, R.
notarisii, Sphaerocarpos michelii, S. texanus, Andreaea heinemannii, Cheilothela
chloropus, Gigaspermum mouretii, Homalia lusitanica, H. webbiana, Oedipodiella
australis and Tortula israelis. A brief botanical comment of the sites visited and a
preliminary species list comprising 194 species (including 55 liverworts) is given.

Didymodon acutus still occurs in the Netherlands -
Didymodon acutus was discovered on a shaded limestone boulder (Maastricht
formation) in the Welterveld chalk grassland area (Voerendaal municipality, province
of Limburg). The two earlier records of this species in the Netherlands date from
1931 and 1949.

Mosses of the Nieuwe Zuider Lingedijk near Leerdam -
The reserve Nieuwe Zuider Lingedijk, about three kilometers south of Leerdam,
consists of reed-lands, woods (mainly alder and willow, with scattered oak, ash and
elder near the fringes), osier-beds and a few floating fens. These marshy sites with
peaty soils are situated along both sides of a heavy clay dike. A couple of concrete
pill-boxes at the fringe of the woods and swamps testify to the former military
function of the dike. In 2000 two square kilometers, containing a substantial part of
the reserve and the dike, were investigated bryologically in behalf of the monitoring
project of the Dutch Bryologicol and Lichenological Society. A small part of a third
square kilometer was also investigated. A total of 107 mosses and 8 liverworts were
found. Orthotrichum acuminatum was found for the second time in the Netherlands
(Van der Pluijm 2001). Some other interesting finds are Tortella tortuosa and Pylaisia
polyantha (on pill-boxes), Sphagnum flexuosum (in floating fens) and Fissidens
adianthoides (in alder-wood). Again it appeared that epifytic mosses (such as
Orthotrichum and Ulota spec.) are performing much better than a decade ago,
probably due to a reduction of air-pollution.

Mossenexcursie naar het Labbegat 2 bij Sprang-Capelle
C.G. Buter

36-39

A bryological excursion to nature reserve Labbegat 2 near Sprang-Capelle (province of North-Brabant) -
Labbegat 2, part of a typical Dutch rural landscape shaped in the past by (cattle)
farmers, consists of narrow and long sections of grasslands, bounded by straight
ditches. The terrain is at or just below sealevel and is periodically inundated. During
the early nineties Labbegat 2 became a nature reserve. Between 1995 and 1997 the
top layer of the soil was removed, resulting in bare ground (sand, peat and clay),
expecting (hoping for) the re-establishment of the former rich flora (from before
1950). Compared to the list of mosses found in 1997/98, several interesting species
were refound in 2002 (e.g. Warnstorfia exannulata, Lophozia capitata, Riccardia
incurvata) and some new species could be added (e.g. Dicranum spurium,
Sphagnum capillifolium, S. teres).

Peltigera polydactylon komt niet voor in Nederland
J.L. Spier

40-41

Peltigera polydactylon (Peltigera polydactyla) does not occur in the
Netherlands. -
There is no evidence that Peltigera polydactylon (P. polydactyla) ever occurred in the
Netherlands. Three from the four collections Peltigera polydactylon (P. polydactyla)
which Vitikainen (1994) mentions from the Netherlands appear to be P. neckeri, the
fourth one being P. hymenina. Eleven collections -once identified as P. polydactylawere
revised by Vitikainen and appeared to be P. hymenina. Additional study of 76
other collections did not reveal any P. polydactylon.

Developments in the terrestrial lichen vegetation of the Loonse &
Drunense Duinen (province of Noord Brabant, NL) in the 1990s. -
In the 1994-1996 period an investigation of the terrestrial lichen vegetation took
place in an inland sand dune area of pleistocene origin, both with sand dune
landscape, heathland and former coppice oak wood. The demolition of the sand
dunes by military practice until the 1990s, was followed by intense recreation,
including horse riding. This resulted in a very large area of bare sand with no
undergrowth in the surrounding edges of the Pinus sylvestris wood. Only in the
centrally located remnants of the coppice wood, were there found significant
diversity and quantity of lichens. Probably connected with a fire prior to the 1980’s,
lichens thrived in a wood reserve in the western part of this National Park. In 2001
these observations were confirmed. In addition, recent management practices in the
western heathlands, such as, temporary grazing by sheep, sod cutting and removing
self-sown trees, proved to be very successful for lichen establishment. In the young
Calluna vulgaris-vegetation the reindeer lichen Cladina portentosa increased
considerably, together with several Cladonia-species. This might indicate a reduced
effect of N-deposition in this western location, where ammonium production is
somewhat lower in comparison to that in the eastern part of this province.

Recent records of Atrichum angustatum in the Netherlands -
In 2002 and 2003 Atrichum angustatum was found at three localities, two times in
the south of the Netherlands (Zuid-Limburg, province of Limburg) and once in the
centre (Veluwe area, province of Gelderland). Formerly it was found near Zeddam in
1856 and in Oost-Flevoland in 1984. Two of the recent records concern more or less
shaded, loamy uprootings of trees, the third refers to several small populations in a
south facing chalk grassland with ant hills.

Secondary substances in Cladonia floerkeana in the Netherlands -
Eighty-nine specimens of Cladonia floerkeana were analyzed by TLC. Four chemical
strains were found: Barbatic acid (12,4%), barbatic acid with 4-0-demethylbarbatic
(83,1%), barbatic with squamatic acid (3,4%) and barbatic with thamnolic acid (1,1%).
The squamatic strain has been previously recognized at species level as C. berghsonii.
However, as no correlation with morphology, distribution or ecology was observed, it is
not accepted as a species.